CVSS: 5.5EPSS: 0%CPEs: 4EXPL: 0CVE-2021-30178
https://notcve.org/view.php?id=CVE-2021-30178
An issue was discovered in the Linux kernel through 5.11.11. synic_get in arch/x86/kvm/hyperv.c has a NULL pointer dereference for certain accesses to the SynIC Hyper-V context, aka CID-919f4ebc5987. Se detectó un problema en el kernel de Linux versiones hasta 5.11.11. La función synic_get en el archivo arch/x86/kvm/hyperv.c presenta una desreferencia de puntero NULL para determinados accesos en el contexto SynIC Hyper-V, también se conoce como CID-919f4ebc5987 • https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=919f4ebc598701670e80e31573a58f1f2d2bf918 https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/IJ5GEETMX3ERQ4DF3GSS2XPNSOOK44OB https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TGQDVYCDM3F5VXUZIADIV2ERL3AJXNJS https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W5YFGIIF24475A2LNW3UWHW2SNCS3G7M • CWE-476: NULL Pointer Dereference •
CVSS: 5.5EPSS: 0%CPEs: 3EXPL: 0CVE-2020-36311
https://notcve.org/view.php?id=CVE-2020-36311
An issue was discovered in the Linux kernel before 5.9. arch/x86/kvm/svm/sev.c allows attackers to cause a denial of service (soft lockup) by triggering destruction of a large SEV VM (which requires unregistering many encrypted regions), aka CID-7be74942f184. Se detectó un problema en el kernel de Linux versiones anteriores a 5.9. El archivo arch/x86/kvm/svm/sev.c permite a atacantes causar una denegación de servicio (bloqueo suave) al desencadenar la destrucción de una SEV VM grande (que requiere anular el registro de muchas regiones cifradas), también se conoce como CID-7be74942f184 • https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.9 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=7be74942f184fdfba34ddd19a0d995deb34d4a03 https://lists.debian.org/debian-lts-announce/2021/07/msg00015.html https://www.debian.org/security/2021/dsa-4941 •
CVSS: 5.5EPSS: 0%CPEs: 1EXPL: 0CVE-2020-36312 – kernel: memory leak upon a kmalloc failure in kvm_io_bus_unregister_dev function in virt/kvm/kvm_main.c
https://notcve.org/view.php?id=CVE-2020-36312
An issue was discovered in the Linux kernel before 5.8.10. virt/kvm/kvm_main.c has a kvm_io_bus_unregister_dev memory leak upon a kmalloc failure, aka CID-f65886606c2d. Se detectó un problema en el kernel de Linux versiones anteriores a 5.8.10. El archivo virt/kvm/kvm_main.c presenta una filtración de la memoria en la función kvm_io_bus_unregister_dev tras un fallo de kmalloc, también se conoce como CID-f65886606c2d A flaw was found in the KVM hypervisor of the Linux kernel. A memory leak could occur in kvm_io_bus_unregister_dev() upon a kmalloc failure. The highest threat from this vulnerability is to system availability. • https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.8.10 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f65886606c2d3b562716de030706dfe1bea4ed5e https://access.redhat.com/security/cve/CVE-2020-36312 https://bugzilla.redhat.com/show_bug.cgi?id=1947991 • CWE-401: Missing Release of Memory after Effective Lifetime CWE-772: Missing Release of Resource after Effective Lifetime •
CVSS: 7.8EPSS: 0%CPEs: 1EXPL: 0CVE-2020-36313
https://notcve.org/view.php?id=CVE-2020-36313
An issue was discovered in the Linux kernel before 5.7. The KVM subsystem allows out-of-range access to memslots after a deletion, aka CID-0774a964ef56. This affects arch/s390/kvm/kvm-s390.c, include/linux/kvm_host.h, and virt/kvm/kvm_main.c. Se detectó un problema en el kernel de Linux versiones anteriores a 5.7. El subsistema KVM permite el acceso fuera de rango a memslots después de una eliminación, también se conoce como CID-0774a964ef56. • https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.7 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0774a964ef561b7170d8d1b1bfe6f88002b6d219 https://security.netapp.com/advisory/ntap-20210604-0005 • CWE-416: Use After Free •
CVSS: 6.5EPSS: 0%CPEs: 2EXPL: 0CVE-2021-28688
https://notcve.org/view.php?id=CVE-2021-28688
The fix for XSA-365 includes initialization of pointers such that subsequent cleanup code wouldn't use uninitialized or stale values. This initialization went too far and may under certain conditions also overwrite pointers which are in need of cleaning up. The lack of cleanup would result in leaking persistent grants. The leak in turn would prevent fully cleaning up after a respective guest has died, leaving around zombie domains. All Linux versions having the fix for XSA-365 applied are vulnerable. • https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html https://xenbits.xenproject.org/xsa/advisory-371.txt • CWE-665: Improper Initialization •